Isoindoline pigments

ABSTRACT

Isoindolinone pigments of the formula ##STR1## in which R is an aryl radical which can contain groups which do not confer solubility and X is a group of the formulae ##STR2## in which Q is a radical of the formula ##STR3## in which R 1  is a di- or tri-halogenophenyl radical or a carbamoylphenyl radical or a phenyl radical which is fused with a 5-membered or 6-membered hetero-ring which contains a cyclically bonded --CONH group, are useful for coloring in yellow to orange shades of good fastness properties.

This is a Divisional of application Ser. No. 892,535, filed Apr. 3, 1978, now U.S. Pat. No. 4,262,120, issued Apr. 14, 1981.

The present invention relates to isoindoline pigments of the formula ##STR4## in which R is an aryl radical which can contain groups which do not confer solubility and X is a group of the formulae ##STR5## in which Q is a radical of the formula ##STR6## in which R₁ is a di- or tri-halogenophenyl, a carbamoylphenyl radical or a phenylcarbamoylphenyl radical which is unsubstituted or substituted by halogen atoms or methyl, trifluoromethyl, methoxy or acetylamino groups, or a phenylene radical which is fused with a 5-membered or 6-membered hetero-ring which contains a cyclically bonded --CONH group, and X₁ and X₂ are H or halogen atoms or alkyl or alkoxy groups having 1-4 C atoms, or in which X₁ and X₂ form a fused benzene ring.

Substituents which do not confer solubility are understood as meaning those which do not effect dissolution of the pigment either in water or in organic solvents, thus, for example, halogen atoms, alkyl or alkoxy groups having 1-6 C atoms, nitro, trifluoromethyl, carbamoyl, ureido, sulphamoyl or cyano groups, alkoxycarbonyl, alkanoyl, alkylcarbamoyl, alkylureido or alkanoylamino groups having 2-6 C atoms, alkylsulphonyl or alkylsulphamoyl groups having 1-6 C atoms or aryloxycarbonyl, aroyl, aroylamino, arylsulphonyl, arylcarbamoyl, arylsulphamoyl, aryl, arylureido or arylazo groups.

R₁ is preferably a radical of the formula ##STR7## in which Y is a H or halogen atom, a methyl or carbamoyl group, an alkanoylamino group having 1-4 C atoms, a benzoylamino or phenylcarbamoyl group, which can be substituted in the phenyl radical by halogen atoms or methyl, methoxy, trifluoromethyl or acetylamino groups, or a phthalimide group which can be substituted in the phenylene radical by chlorine atoms, and Y₁ and Y₂ are H or halogen atoms or alkyl or alkoxy groups having 1-4 C atoms, or in which Y and Y₁ form a fused 5-membered to 6-membered hetero-ring which contains a cyclically bonded --CONH group.

Preferred pigments are those of the formula ##STR8## in which X₁, X₂, Y, Y₁ and Y₂ are as defined above.

Particularly preferred pigments are those of the formula ##STR9## in which Y, Y₁ and Y₂ are as defined above, Z is a H, chlorine or bromine atom, a carbamoyl group or a phenylcarbamoyl group which is unsubstituted or substituted by chlorine atoms or methyl groups, and Z₁ and Z₂ are H, chlorine or bromine atoms, Z₁ and Z₂ being chlorine or bromine atoms when Z is H and Z₁ and/or Z₂ being chlorine or bromine when Z is halogen, or in which Z and Z₁ form a fused 5-membered to 6-membered hetero-ring which contains a cyclically bonded --CONH group, and especially those of the formula ##STR10## in which Z, Z₁ and Z₂ are as defined.

The pigments according to the invention are obtained by subjecting a diiminoisoindoline of the formula ##STR11## to a condensation reaction with, in any desired sequence, one mol of a cyanoacetanilide of the formula ##STR12## and one mol of a compound of the formula XH₂, in which formulae R and X are as defined.

Examples of cyanoacetanilides are: cyanoacetic acid anilide, cyanoacetic acid 2'-, 3'- or 4'-chloroanilide, cyanoacetic acid 2',4'-dichloroanilide, cyanoacetic acid 2',5'-dichloroanilide, cyanoacetic acid 2',3'-dichloroanilide, cyanoacetic acid 3',4'-dichloroanilide, cyanoacetic acid 3',5'-dichloroanilide, cyanoacetic acid 2',4',5'-trichloroanilide, cyanoacetic acid 3',4',5'-trichloroanilide, cyanoacetic acid 4'-bromoanilide, cyanoacetic acid 3',4'-dibromoanilide, cyanoacetic acid 3'-chloro-4'-bromoanilide, cyanoacetic acid 3'-bromo-4'-chloroanilide, cyanoacetic acid 2'-, 3'- or 4'-methylanilide, cyanoacetic acid 2',4'-dimethylanilide, cyanoacetic acid 2',4',6'-trimethylanilide, cyanoacetic acid 2'-, 3'- or 4'-methoxyanilide, cyanoacetic acid 4'-acetylaminoanilide, cyanoacetic acid 4'-benzoylaminoanilide, cyanoacetic acid 4'-p-chloro-benzoylamino-anilide, cyanoacetic acid 4'-phthalimido-anilide, cyanoacetic acid 2',5'-dichloro-4'-benzoylaminoanilide, cyanoacetic acid 2',5'-dichloro-4'-p-chlorobenzoylamino-anilide, cyanoacetic acid 2',5'-dichloro-4'-methoxy-anilide, cyanoacetic acid 2',5'-dimethoxy-4'-benzoylamino-anilide, cyanoacetic acid 4'-nitroanilide, cyanoacetic acid 3'-chloro-4'-methyl-anilide, cyanoacetic acid 2'-, 3'- or 4'-methoxycarbonyl-anilide, cyanoacetic acid 3'-trifluoromethyl-anilide, cyanoacetic acid 2',5'-diethoxy-4'-benzoylamino-anilide, cyanoacetic acid 2',5' -dimethoxy-chloroanilide, cyanoacetic acid 4'-carbamoyl-anilide, cyanoacetic acid 3'-chloro-4'-carbamoyl-anilide, cyanoacetic acid 2'-methyl-4'-carbamoyl-anilide, cyanoacetic acid 2'-chloro-5'-carbamoyl-anilide, cyanoacetic acid 2'-methyl-5'-carbamoyl-anilide, cyanoacetic acid 2'-methoxy-5'-carbamoyl-anilide, cyanoacetic acid 2'-chloro-5'-phenylcarbamoyl-anilide, cyanoacetic acid 2'-methyl-5'-phenylcarbamoyl-anilide, cyanoacetic acid 2'-methoxy-5'-phenylcarbamoyl-anilide, cyanoacetic acid 2'-chloro-5'-p-methylcarbamoyl-anilide, cyanoacetic acid 2'-chloro-5'-p-chlorocarbamoyl-anilide, cyanoacetic acid 2'-methoxy-5'-p-chlorocarbamoyl-anilide, cyanoacetic acid 2'-methoxy-5'-m-trifluoromethylcarbamoyl-anilide and cyanoacetic acid 2'-methoxy-5'-2",5"-dichlorocarbamoyl-anilide, and also the cyanoacetyl compounds of the following amines: 5-amino-benzimidazolone, 5-amino-1-methyl-benzimidazolone, 5-amino-6-chloro-benzimidazolone, 5-amino-6-methyl-benzimidazolone, 6-amino-quinazol-4-one, 6-amino-2-methyl-quinazol-4-one, 7-amino-quinazolone, 2-(4'-aminophenyl)-quinazol-4-one, 6-amino-2,4-dihydroxyquinazoline, 7-amino-phenmorphol-3-one, 6-amino-phenmorphol-3-one, 7-amino-6-methyl-phenmorphol-3-one, 6-amino-quinol-2-one, 7-amino-4-methyl-quinol-2-one, 6-amino-7-chloro-4-methyl-quinol-2-one and 7-amino-4,8-dimethyl-quinol-2-one.

The cyanoacetyl compounds are known compounds which are obtained by heating ethyl cyanoacetate with the corresponding amines.

The compounds of the formula XH₂ are, on the one hand, barbituric acid and, on the other hand, cyanomethylene compounds of the formula ##STR13## in which Q is as defined.

Examples of cyanoacetanilides of the formula CNCH₂ CONHR₁ are: cyanoacetic acid 2',3'-dichloroanilide, cyanoacetic acid 3',4'-dichloroanilide, cyanoacetic acid 3',5'-dichloroanilide, cyanoacetic acid 2',4'-dichloroanilide, cyanoacetic acid 3',4',5'-trichloroanilide, cyanoacetic acid 3',4'-dibromoanilide, cyanoacetic acid 4'-carbamoyl-anilide, cyanoacetic acid 3'-chloro-4'-carbamoyl-anilide, cyanoacetic acid 4'-phthalimido-anilide, cyanoacetic acid 3'-bromo-4'-chloroanilide, cyanoacetic acid 3'-chloro-4'-bromoanilide, cyanoacetic acid 2'-chloro-5'-carbamoyl-anilide, cyanoacetic acid 2'-methyl-5'-carbamoyl-anilide, cyanoacetic acid 2'-methoxy-5'-carbamoyl-anilide, cyanoacetic acid 2'-chloro-5'-phenylcarbamoyl-anilide, cyanoacetic acid 2'-methoxy-5'-phenylcarbamoyl-anilide, cyanoacetic acid 2'-methyl-5'-phenylcarbamoyl-anilide, cyanoacetic acid 2'-chloro-5'-p-chlorophenylcarbamoyl-anilide, cyanoacetic acid 2'-chloro-5'-p-methyl-phenylcarbamoyl-anilide and cyanoacetic acid 2'-methoxy-5-p-chloro-phenylcarbamoyl-anilide.

The compounds of the formula ##STR14## are also known and are obtained by a condensation reaction of ethyl cyanoacetate with anthranilic acid amides, for example anthranilamide, 2-amino-3-chloro-benzamide, 2-amino-4-chlorobenzamide, 2-amino-5-chloro-benzamide, 2-amino-5-methyl-benzamide, 2,3-aminonaphthoic acid amide, 2-amino-4,6-dichlorobenzamide or 2-amino-5-methoxy-benzamide.

The condensation reaction of diiminoisoindoline with the cyanoacetanilides and the compound of the formula XH₂ is preferably carried out in an organic solvent, for example an aliphatic alcohol having 1-4 C atoms, such as methanol, ethanol, isopropanol or butanol, and also glycols or glycol ethers, open-chain or cyclic amides, such as dimethylformamide, dimethylacetamide or N-methylpyrrolidone, a halogenated benzene, such as mono-, di- or tri-chlorobenzene, or nitrobenzene or an aliphatic mono- or di-carboxylic acid, such as formic acid, acetic acid, propionic acid, mono- or di-chloroacetic acid, fumaric acid, lactic acid or tartaric acid, or an aromatic carboxylic acid, such as benzoic acid, phthalic acid or salicylic acid, and it is also possible to use mixtures of the said solvents. In order to prepare asymmetric dicondensation products it can be advantageous if the monocondensation products are first prepared with the cyanoacetanilides. The reaction to give the monocondensation products is advantageously carried out in neutral organic solvents, for example an aliphatic alcohol having 1-4 C atoms, such as methanol, ethanol, isopropanol or butanol, and an excess of diiminoisoindoline is used. If necessary, these products can be isolated and purified. As a rule, the replacement of the first imino group of diiminoisoindoline already takes place at temperatures below 100° C. The replacement of the second imino group, on the other hand, requires temperatures of between 100° and 200°.

In most cases, the resulting pigments already precipitate in the hot mixture and can be isolated in a pure form by filtering off and, if necessary, by washing with ogranic solvents.

The resulting pigments in general have a good texture and in most cases can be used in the form of the crude products. If necessary or desirable, the crude products can be converted into a finely disperse form by grinding or kneading. In this case, grinding assistants, such as inorganic and/or organic salts, in the presence or absence of organic solvents, are advantageously used. An improvement in the properties can frequently also be achieved by treating the crude pigments with organic solvents. After grinding, assistants are removed in a conventional manner, soluble inorganic salts being removed, for example, with water and organic assistants which are insoluble in water being removed, for example, by steam distillation.

The pigments obtained according to the invention are suitable for colouring high-molecular organic material of natural or synthetic origin. The materials can be, for example, natural resins, drying oils or rubber. However, they can also be modified natural substances, for example chlorinated rubber, oil-modified alkyd resins or cellulose derivatives, such as viscose, acetylcellulose and nitrocellulose, and especially fully synthetic organic polyplasts, i.e. plastics which are prepared by polymerisation, polycondensation and polyaddition. Plastics of this category are, in particular, those which follow: polyethylene, polypropylene, polyisobutylene, polystyrene, polyvinyl chloride, polyvinyl acetate, polyacrylonitrile, polyacrylates and polymethacrylates; polyesters, especially high-molecular esters of aromatic polycarboxylic acids with polyfunctional alcohols; polyamides; the condensation products of formaldehyde with phenols, i.e. the so-called phenoplasts, and the condensation products of formaldehyde with urea, thiourea and melamine, i.e. the so-called aminoplasts; the polyesters used as lacquer resins, specifically both saturated resins, for example alkyd resins, and unsaturated resins, for example maleate resins, and also the polyaddition and polycondensation products of epichlorohydrin with diols or polyphenylene which are known by the name "epoxide resins"; and also the so-called thermoplastics, i.e. the non-curable polyplasts. It is emphasised that not only the single compounds but also mixtures of polyplasts and also co-condensates and copolymers, for example those based on butadiene, can be pigmented according to the invention.

The pigments according to the invention are suitable for colouring vinyl, polyolefin and styrene polymers, such as polyplasts, such as so-called film-forming agents or binders which are known as lacquer raw materials, especially linseed oil varnish, nitrocellulose, alkyd resins, melamine resins and urea-formaldehyde resins. Pigmenting of the high-molecular organic substances with the pigments is carried out, for example, by mixing a pigment of this type, if desired in the form of a master batch, into the substrates using roll mills or mixing or grinding apparatuses. The pigmented material is then brought into the desired final form by processes known per se, such as calendering, compression moulding, extrusion, spreading or casting or by injection moulding. Frequently it is desirable, in order to produce non-rigid mouldings or to reduce the brittleness thereof, to incorporate so-called plasticisers into the high-molecular compounds before shaping. Examples of plasticisers which can be used are esters of phosphoric acid, phthalic acid or sebacic acid. In the process according to the invention, the plasticisers can be worked into the polyplasts before or after the organic pigment is incorporated. It is also possible, in order to obtain different colour shades, also to add fillers or other colouring constituents, such as white pigments, coloured pigments or black pigments, in any desired amounts, in addition to the compounds of the formula (I), to the high-molecular organic material.

For pigmenting lacquers and printing inks, the high-molecular organic materials and the pigments, if desired together with additives such as fillers, other pigments, siccatives or plasticisers, are finely dispersed or dissolved in a common organic solvent or solvent mixture. The procedure employed can be that the individual components are dispersed or dissolved on their own or that several components are dispersed or dissolved together, and that all the components are combined only after this.

The pigmented high-molecular organic materials contain, in general, amounts of 0.001 to 30% by weight of pigment, based on the high-molecular organic material to be pigmented, and polyplasts and lacquers preferably contain 0.1 to 5% and printing inks preferably contain 10 to 30%. The amount of pigment which is to be chosen depends, in particular, on the desired depth of colour and also on the layer thickness of the moulding and finally, where appropriate, also on the white pigment content of the polyplast.

The pigmented high-molecular organic substances have very fast yellow to red colour shades and are distinguished by clarity of the colour shade, good fastness to light, weathering, migration, over-lacquering and solvents and stability to heat. The pigments also have such a good tinctorial strength that they still give deep colorations even after they have been converted into a covering form.

The examples which follow illustrate the invention. Temperatures are in degrees centigrade.

EXAMPLE 1

3.57 g of 1-(cyano-3',4'-dichlorophenylcarbamoylmethylene)-3-imino-isoindoline and 4.58 g of cyanoacetic acid 3',4'-dichloroanilide in 50 ml of glacial acetic acid are heated to the reflux temperature, with stirring. As soon as the reaction mixture becomes viscous due to the orange colorant which precipitates, it is diluted with 50 ml of dimethylformamide and refluxed for a further 2 hours. After cooling to 100°, the pigment formed is filtered off with suction, washed with methanol, acetone and water and dried at 100°. This gives 4.4 g of 1,3-di-(cyano-3',4'-dichlorophenylcarbamoylmethylene)-isoindoline, which, in this form, can be incorporated direct as a pigment in paints and plastics. The colorations obtained therewith are distinguished by a very clear reddish-tinged yellow colour shade with outstanding fastness properties, especially good fastness to solvents, light and weathering. The 1-(cyano-3',4'-dichlorophenylcarbamoylmethylene)-3-imino-isoindoline employed is obtained by a known method from diiminoisoindoline and cyanoacetic acid 3',4'-dichloroanilide by a condensation reaction, in a molar ratio of 2:1, in boiling methanol.

EXAMPLE 2

2.9 g of diiminoisoindoline and 11.45 g of cyanoacetic acid 3',4'-dichloroanilide in 100 ml of o-dichlorobenzene are warmed at 70° for 2 hours, during which time the yellow monocondensation product forms. 5 ml of acetic acid are now added and the reaction temperature is raised to 140°-150°. After 5 hours, the mixture is allowed to cool to 100° and the product is filtered off with suction, washed with methanol and water and dried. This gives 9.8 g of pigment, which has the same properties as the product described in Example 1.

Pigments having equally good fastness properties are obtained when, in this example, o-dichlorobenzene is replaced by nitrobenzene or trichlorobenzene and acetic acid is replaced by one of the following acids: propionic acid, chloroacetic acid, dichloroacetic acid, phthalic anhydride, salicylic acid, fumaric acid, lactic acid or tartaric acid.

A particularly good fastness to solvents is obtained when, in Example 2, acetic acid is replaced by formic acid.

EXAMPLE 3

As in Example 1, 12.9 g of 1-(cyano-4'-chlorophenylcarbamoyl-methylene)-3-imino-isoindoline and 18.3 g of cyanoacetic acid 3',4'-dichloroanilide are first heated in 200 ml of glacial acetic acid and the reaction mixture is then diluted with 200 ml of dimethylformamide. After cooling to 100°, filtering with suction and washing the product with methanol and water, 16.6 g of an orange pigment, which is suitable for colouring lacquers, are obtained. Colorations with good fastness to over-lacquering, light and weathering are obtained.

In Table I which follows, further pigments are described which are obtained when the compounds of the formula ##STR15## in which R is as described in column II, are subjected to a condensation reaction with cyanoacetic acid 3',4'-dichloro-anilide, in accordance with the instructions of Example 3.

                  TABLE I                                                          ______________________________________                                         Example                  Colour shade                                          No.    R                 in lacquers                                           ______________________________________                                         4      phenyl            orange                                                5      3,4-dichlorophenyl                                                                               reddish-tinged yellow                                 6      4-carbamoylphenyl orange                                                7      3-chloro-4-carbamoylphenyl                                                                       orange                                                8      4-methylphenyl    red                                                   9      3,4-dimethylphenyl                                                                               orange                                                10     2,4,5-trichlorophenyl                                                                            yellow                                                11     4-phthalimidophenyl                                                                              orange                                                12     3-chloro-4-methylphenyl                                                                          orange                                                13     2-methoxycarbonylphenyl                                                                          yellow                                                14     2,5-dichloro-4-p-chloro-                                                                         reddish-tinged yellow                                        benzoylaminophenyl                                                      15     2,5-diethoxy-4-benzoyl-                                                                          brown                                                        aminophenyl                                                             16     4-methoxy-2-nitrophenyl                                                                          orange                                                ______________________________________                                    

EXAMPLE 17

3.2 g of 1-(cyano-4'-chlorophenylcarbamoyl-methylene)-3-imino-isoindoline and 4.58 g of cyanoacetic acid 3',4'-dichloroanilide in 50 ml of nitrobenzene are heated at 180° for 2 hours, with stirring. The orange colorant which has precipitated is filtered off with suction at 100°, washed with methanol, acetone and water and dried. This gives 3.2 g of pigment, which is brought into a state of fine division by grinding in isopropanol with the aid of grinding bodies. Orange colorations of high fastness are obtained with this pigment when it is incorporated in lacquers.

EXAMPLE 18

1.45 g of diiminoisoindoline, 3.43 g of cyanoacetic acid 3',4'-dichloroanilide and 0.97 g of cyanoacetic acid 4'-chloroanilide in 50 ml of o-dichlorobenzene are heated to 100°. 5 ml of formic acid are now added dropwise and the mixture is then warmed to 150°. After 4 hours, it is allowed to cool to 100° and the pigment is filtered off with suction, washed with alcohol, acetone and water and dried. This gives 3.7 g of a pigment powder having outstanding fastness to solvents. The crude product is suitable direct for colouring lacquers and yellow-orange colorations of high fastness are obtained.

EXAMPLE 19

2.88 g of 1-(cyano-phenylcarbamoyl-methylene)-3-iminoisoindoline and 1.28 g of barbituric acid in 50 ml of glacial acetic acid are refluxed, with stirring. The red-coloured reaction product forms as a thick precipitate. The reaction mixture is diluted with 50 ml of dimethylformamide and heated at 120°-130° for a further 10 minutes. The insoluble colorant is filtered off with suction at 100°, washed with methanol and water and dried at 100°. This gives 3.6 g of pigment, which can be employed direct for colouring paints. When it is incorporated in lacquers, the pigment is distinguished by a clear orange colour shade, good stability to light and weathering and also high fastness to over-lacquering.

In Table II which follows, further pigments are described which are obtained when the compounds of the formula ##STR16## in which R is as defined in column II, are subjected to a condensation reaction with barbituric acid, in accordance with the instructions of Example 19.

The pigments are distinguished by good fastness properties.

                  TABLE II                                                         ______________________________________                                         Example                      Colour shade                                      No.     R                    in lacquers                                       ______________________________________                                         20      4-chlorophenyl       red                                               21      4-methylphenyl       red                                               22      2,4-dichlorophenyl   red                                               23      2,5-dichlorophenyl   yellow                                            24      3,5-dimethylphenyl   orange                                            25      3,5-dichlorophenyl   yellow                                            26      3,4-dimethylphenyl   red                                               27      2-chlorophenyl       orange                                            28      4-carbamoylphenyl    orange                                            29      4-phthalimidophenyl  brown                                             30      4-bromophenyl        orange                                            31      4-benzoylaminophenyl brown                                             32      3-chlorophenyl       orange                                            33      4-acetylaminophenyl  brown                                             34      2-methoxycarbonylphenyl                                                                             yellow                                            35      4-methyl-2-nitrophenyl                                                                              reddish-tinged                                                                 yellow                                            36      2-methyl-5-carbamoylphenyl                                                                          reddish-tinged                                                                 yellow                                            37      2-chloro-5-carbamoylphenyl                                                                          yellow                                            38      4-nitrophenyl        yellow                                            39      3-chloro-4-carbamoylphenyl                                                                          orange                                            40      4-p-chlorophenylcarbamoylphenyl                                                                     orange                                            41      2-methyl-5-p-chlorophenyl-                                                                          yellow                                                    carbamoylphenyl                                                        42      2-ethoxycarbonylphenyl                                                                              yellow                                            43      2-chloro-5-p-chlorophenyl-                                                                          yellow                                                    carbamoylphenyl                                                        44      2-methoxy-5-p-chlorophenyl-                                                                         orange                                                    carbamoylphenyl                                                        45      2-chloro-5-p-methoxyphenyl-                                                                         yellow                                                    carbamoylphenyl                                                        46      2-chloro-5-p-acetylaminophenyl-                                                                     yellow                                                    carbamoylphenyl                                                        47      2-methoxy-5-2',5'-dichlorophenyl-                                                                   red-brown                                                 carbamoylphenyl                                                        48      2-chloro-5-2'-methoxyphenyl-                                                                        yellow                                                    carbamoylphenyl                                                        49      2-carbamoylphenyl    yellow                                            50      2-methyl-5-2',5'-dichlorophenyl-                                                                    orange                                                    carbamoylphenyl                                                        51      2-methylphenyl       orange                                            52      2-methoxyphenyl      brown                                             ______________________________________                                    

EXAMPLE 53

2.88 g of 1-(cyano-phenylcarbamoyl-methylene)-3-iminoisoindoline and 3.7 g of 2-cyanomethyl-quinazolone in 50 ml of glacial acetic acid are refluxed for 10 minutes, with stirring. The sparingly soluble orange colorant formed is filtered off hot, with suction, washed with methanol, acetone and water and dried. This gives 4.0 g of the pure bis-methine-isoindoline pigment, which, when incorporated in PVC films, gives clear orange colorations with a good fastness to migration and light.

In Table III which follows, further pigments are described which are obtained when the compounds of the formula ##STR17## in which R is as defined in column II, are subjected to a condensation reaction with cyanomethyl compounds of the formula NCCH₂ -R₃, in which R₃ is as defined in column III, in accordance with the instructions of Example 53. The pigments are distinguished by clarity and good fastness.

                  TABLE III                                                        ______________________________________                                         Example                           Colour shade                                 No.    R              R.sub.3     in PVC films                                 ______________________________________                                         54     4-methylphenyl 2-quinazolyl                                                                               orange                                       55     4-phthalimido-phenyl                                                                          2-quinazolyl                                                                               bluish-                                                                        tinged red                                   56     4-carbamoylphenyl                                                                             2-quinazolyl                                                                               red                                          57     4-methylphenyl 7-chloro-2-quin-                                                                           bluish-                                                            azolyl      tinged red                                   58     4-methylphenyl 6-chloro-2-quin-                                                                           scarlet                                                            azolyl                                                   59     phenyl         6-chloro-2-quin-                                                                           orange                                                             azolyl                                                   ______________________________________                                    

In Table IV which follows, further pigments are listed which are obtained when compounds of the formula ##STR18## are subjected to a condensation reaction with cyanoacetic acid anilides of the formula NCCH₂ CONHR₁, in which R₁ is as defined in colunm II, in accordance with the instructions of Example 1. The resulting pigments are distinguished by good fastness properties.

                  TABLE IV                                                         ______________________________________                                         Example                  Colour shade                                          No.    R.sub.1           in lacquers                                           ______________________________________                                         60     3,5-dichlorophenyl                                                                               reddish-tinged yellow                                 61     3,4-dibromophenyl reddish-tinged yellow                                 62     3,4,5-trichlorophenyl                                                                            yellow                                                63     4-carbamoylphenyl orange                                                64     3-chloro-4-carbamoylphenyl                                                                       orange                                                65     4-phthalimidophenyl                                                                              reddish-tinged yellow                                 ______________________________________                                    

In Table V which follows, further pigments are listed which are obtained when compounds of the formula ##STR19## are subjected to a condensation reaction with cyanoacetic acid anilides of the formula NCCH₂ CONHR₁, in which formulae R and R₁ are as defined in column II and III, in accordance with the instructions of Example 3. The resulting pigments are distinguished by good fastness properties.

                  TABLE V                                                          ______________________________________                                         Ex-                                 Colour                                     ample                               shade in                                   No.   R           R.sub.1           lacquers                                   ______________________________________                                         66    phenyl      4-carbamoylphenyl yellow                                     67    4-chlorophenyl                                                                             3-chloro-4-carbamoylphenyl                                                                       yellow                                     68    4-chlorophenyl                                                                             3-chloro-4-carbamoylphenyl                                                                       orange                                     69    phenyl      5-benzimidazolonyl                                                                               brown                                      70    4-chlorophenyl                                                                             7-quinazolyl      orange                                     71    4-chlorophenyl                                                                             2-chloro-5-phenylcarbamoyl-                                                                      yellow                                                       phenyl                                                       72    4-chlorophenyl                                                                             2-chloro-5-carbamoylphenyl                                                                       reddish-                                                                       tinged                                                                         yellow                                     73    4-chlorophenyl                                                                             2-methyl-5-carbamoylphenyl                                                                       yellow                                     74    4-chlorophenyl                                                                             2-methoxy-5-phenyl-                                                                              orange                                                       carbamoylphenyl                                              75    phenyl      2-chloro-5-carbamoylphenyl                                                                       orange                                     76    4-chlorophenyl                                                                             3-chloro-4-p-chlorophenyl-                                                                       orange                                                       carbamoylphenyl                                              77    4-chlorophenyl                                                                             2-chloro-5-p-chlorophenyl-                                                                       reddish-                                                     carbamoylphenyl   tinged                                                                         yellow                                     78    4-chlorophenyl                                                                             2-methyl-5-m-chlorophenyl-                                                                       orange                                                       carbamoylphenyl                                              79    4-chlorophenyl                                                                             2-methoxy-5-p-chlorophenyl-                                                                      orange                                                       carbamoylphenyl                                              80    4-chlorophenyl                                                                             2-methoxy-5-2',5'-dichloro-                                                                      orange                                                       phenylcarbamoylphenyl                                        81    4-chlorophenyl                                                                             2-chloro-5-p-methylphenyl-                                                                       yellow                                                       carbamoylphenyl                                              82    phenyl      2-chloro-5-p-chlorophenyl-                                                                       yellow                                                       carbamoylphenyl                                              83    4-methoxy-  2-chloro-5-carbamoylphenyl                                                                       yellow                                           carbonylphenyl                                                           84    phenyl      2-methoxy-5-phenyl-                                                                              yellow                                                       carbamoylphenyl                                              85    3,4-dichloro-                                                                              4-chloro-2,5-dimethoxy-                                                                          brown                                            phenyl      phenyl                                                       ______________________________________                                    

EXAMPLE 86

0.6 g of the pigment prepared according to Example 1 is mixed together with 67 g of polyvinyl chloride, 33 g of dioctyl phthalate, 2 g of dibutyl-tin dilaurate and 2 g of titanium dioxide and the mixture is processed on a roll mill for 15 minutes at 160° C. to give a thin film. The reddish-tinged yellow coloration produced in this way is deep and fast to migration, heat and light.

EXAMPLE 87

1.00 g of the pigment prepared according to Example 19 is finely ground with 4.00 g of printing varnish having the composition: 29.4% of linseed oil-stand oil (300 poise), 67.2% of linseed oil-stand oil (20 poise), 2.1% of cobalt octoate (8% of Co) and 1.3% of lead octoate (24% of Pb), on an Engelsmann grinding machine and then printed, with the aid of a block, by the letterpress process, in an amount of 1 g/m² on art paper. Deep, orange prints of good transparency and good gloss and good fastness to light are obtained.

The pigment is also suitable for other printing processes, such as gravure printing, offset printing and flexographic printing, and in these cases also gives very good results.

EXAMPLE 88

1 g of the pigment according to Example 3 and 5 g of titanium dioxide are added to 100 g of a stoving lacquer which consists of 58.5 g of a 60% strength solution of a coconut alkyd resin in xylene, 23 g of a 65% strength solution of a melamine lacquer resin in butanol, 17 g of xylene and 1.5 g of butanol. The mixture is ground for 48 hours in a ball mill and the lacquer pigmented in this way is sprayed onto a cleaned metal surface. After stoving at 120°, an orange coloration is obtained which has a good depth of colour and fastness to light, over-lacquering and weathering. 

What is claimed is:
 1. An isoindoline pigment of the formula ##STR20## wherein R is phenyl mono- or di-substituted by chlorine, bromine, methyl, methoxy, nitro, methoxycarbonyl, ethoxycarbonyl, methoxyphenylcarbamoyl, acetylaminophenylcarbamoyl or phthalimido; with the proviso that phenyl is mono-substituted when only chlorine or bromine is substituted thereon.
 2. The pigment of claim 1, wherein R is 4-chlorophenyl.
 3. the pigment of claim 1, wherein R is 2-methoxycarbonylphenyl.
 4. The pigment of claim 1, wherein R is 2-ethoxycarbonylphenyl.
 5. The pigment of claim 1, wherein R is 2-methylphenyl. 